| 摘要 |
<p>A near-infrared-ray absorbing material of the disclosure containing a cyanine compound represented by general formula (I) exhibits a sharp light absorption in the wavelength range between 800 and 1000 nm and has excellent light resistance. In formula (I), R 1 to R 4 , Y 1 , and Y 2 represent a hydrogen atom, a group represented by formula (II) or (II'), etc.; An q- represents a q-valent anion; at least either R 1 is a group represented by formula (II) or (II') or An q- is an ion represented by formula (III); R 11 to R 13 represent a hydrogen atom, a hydroxyl group, etc.; and Z 1 and Z 2 represent a C 1-10 alkyl group, etc. In formula (II'), the bond between G' and T' is a double bond or a conjugated double bond; G' represents a carbon atom; T' represents a carbon atom or a nitrogen atom; the ring containing G' and T' represents a 6-membered ring, etc.; w' represents 0 to 4; and R 01' represents a hydrogen atom, a hydroxyl group, etc. In formula (III), R 5 and R 6 represent a halogen-substituted C 1-8 alkyl group.</p> |
